Home / 1,428.30-2,142.45-1,367.55

Finding the Fourth Proportional to 1,428.30, 2,142.45 and 1,367.55

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Solution

The fourth proportional to 1,428.30, 2,142.45 and 1,367.55 is: 2,051.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.30 : 2,142.45 = 1,367.55 : x
  2. Step 2: Convert to fraction form
    1,428.30/2,142.45 = 1,367.55/x
  3. Step 3: Cross multiply
    1,428.30x = 2,142.45 × 1,367.55
  4. Step 4: Simplify right side
    1,428.30x = 2,929,907.50
  5. Step 5: Solve for x
    x = 2,929,907.50/1,428.30
  6. Step 6: Final answer
    x = 2,051.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.